Add conditional probability notebook

[Haleshot]

📝 Summary

Referred to Conditional Probability chapter and used it as a base reference to explain the concept.
Can't seem to think of an interactive example for this concept and don't want to "force" thinking about this (as most of the times I know how one should be designed). Do let me know about your thoughts on this.

• Use appropriate venn visualizations.
• Appropriate LaTeX usage
• Function based examples

TODO:

• Revisit interactive example (if needed)

📋 Checklist

• I have included package dependencies in the notebook file using --sandbox
• If adding a course, include a README.md
• Keep language direct and simple.

[akshayka]

Looks great, made some small edits!